Ballistic Silence of Special Years

Southeast of Xianlai Island.

On board the No. 1 boat in Huang Fang’s Canglong-class submarine formation.

Ten minutes ago, the captain had received a situation notice from the direction of Nabo base.

Our own fighter formation and the red team were defeated in the air battle that broke out in the waters of Xianlai Island. The current predicament cannot be relieved. Boat No. 1 is ordered to make its own tactical judgment. It can temporarily dive in place to save its life and wait for follow-up tactical arrangements. Waiting for an opportunity to escape.

The implication is that it's up to you.

Huang Fang has put a lot of effort into bringing in so many fighter jets this time, including the most advanced fighter jets like the F35A.

It seems that everything that can be done is done for a submarine.

Temporarily sitting on the bottom means that the captain can rely on the silent performance and long-submersible performance of the Soryu-class submarine to temporarily hibernate, and wait for the opportunity to escape the next time the red and yellow sides fight.

But of course this is an extremely slim hope.

At this moment, the red anti-submarine aircraft overhead must have returned to this area and resumed their anti-submarine missions.

"Stop engine and enter silent mode."

In order to save his life, the captain could only immediately order the submarine to enter "Teenage Mutant Ninja Turtles" mode again.

Relying on this advantage of the Soryu-class AIP submarine, there may be a chance of survival.

In less than ten seconds, all propulsion systems and power systems of the submarine were shut down, and only the ultra-long wave radio channel was retained for communication to accept short messages. This mode is the only communication mode in the water that does not rely on the submarine to float up, extend the antenna and release the communication buoy. .

The advantage is that it is concealed enough, but the disadvantage is that the bandwidth is extremely narrow, and the propagation speed of ultra-long waves in water is extremely poor, so it can only receive some very short content messages, and the delay is very serious. In most cases, each submarine has its own translation codebook, which can translate more detailed command content through very short messages.

A submarine would not do this unless absolutely necessary.

But at this time, disaster was imminent, and Huang Fang's No. 1 boat could only do this, otherwise its life would not be saved.

The captain looked at his position.

At this moment, the location of boat No. 01 is northwest of Xianlai Island, within the continental shelf of the D Sea, and belongs to the shallow sea area.

But less than 90 kilometers to the east is the Liuqiu Trough, a back-arc basin formed by the expansion of the lithosphere in the Liuqiu Trench. Most of it is more than 1 meters deep, with a maximum depth of 000 meters.

"What a pity……"

The captain looked at the trench and sighed.

As long as he is given a little more time, three hours, only three hours, he can enter the Liuqiu Trough, dive to a depth of 500 meters, completely let himself go, and return to freedom.

But now there is no chance.

The sonar officer on the boat desperately discovered based on the noise made by the red side when the buoy sonar was thrown into the water, that the anti-submarine aircraft group had thrown an entire sonar chain along the edge of the trough, forming a complete sonar array.

According to the previously calibrated sonar buoy position, the captain can actually imagine the red party’s intention——

Since I can think of running to Liuqiu Trench to escape, the other party can also think of it, and if the advantage is on the red side, they will not give me even the slightest chance to enter the trough.

Now the hope of heading north back to the main island of Huangfang and turning right to the east and entering the trough has been shattered.

Although the Soryu-class submarine can rely on the Stirling engine to lurk underwater for up to three weeks, and can even last for a month without surfacing in a silent state.

But that doesn't mean that as long as you sit quietly, the other party won't be able to deal with you.

Especially in this deep sea situation.

And what he worried about finally happened.

Inside the Red Side Joint Staff Department.

Li Zheng received news from the Navy that the Soryu-class submarine that had slipped through the net had been found. It was about 100 kilometers west of the Okinawa Trench and north of Xianlai Island. At this time, it was about 250 meters underwater. Meter depth, all engines have been shut down and entered silent mode.

The head of the Navy asked what instructions the head of the Joint Staff had.

According to normal practice, there is no need to ask for instructions at this time.

The head of the navy in theater D can make his own decision, and even the commander of the aircraft carrier group No. 001 can order anti-submarine aircraft to go there to triangulate the sonar dropped on it and then sink it.

But it happened that Zheng Zhen had issued an order before. When the submarine was discovered, he should first report the situation and wait for instructions.

Therefore, the Navy suppressed its anger and temporarily reported the discovery of the submarine's approximate location to the Joint Staff, requesting serious instructions.

Speaking of, why was this Soryu-class submarine discovered even though it was sitting silently on the bottom?

This is what Captain Huang Fang was most worried about has happened.

For Huang Fang's high-level silent submarine, it is difficult for ordinary sonar buoys to detect its track.

Unless it has been sailing underwater, if it is willing to sit on the bottom, turn off the engine and enter silence, and only maintain the basic power supply needs of the boat, then its noise is indeed very small, and ordinary sonar cannot detect it at all.

Unfortunately.

Its current location is killing it.     The fatal reason is the water depth.

It was not the Z-1F that discovered the No. 18 boat, but a GX-6 anti-submarine aircraft.

Compared with the carrier-based Z-18F anti-submarine helicopter, the performance and means of fixed-wing anti-submarine aircraft such as the GX-6 are relatively rich.

For example, in addition to throwing sonar for anti-submarine warfare, the GX-6 also has a variety of other unique anti-submarine skills, one of which is called the magnetic anomaly detection function.

If you have seen GX-6, you will see a long "needle" on its tail, which is actually a metal detection antenna.

The function of this thing is to conduct search and anti-submarine based on the principle of the earth's magnetic field.

The Earth has a magnetic field, which is thought to be generated by the stable spin of a large amount of iron-containing fluid inside the Earth's core. Therefore, in addition to the north and south poles, the earth also has north and south magnetic poles. Although the specific positions of the north and south magnetic poles move dozens of kilometers every year, and the geomagnetic field also changes in intensity and may even reverse once every few hundred thousand years, the earth's magnetic field is relatively stable most of the time.

The magnetic anomaly detector measures the gradient anomaly of the magnetic field on the Earth's surface. Without large-tonnage metal objects, the Earth's magnetic field changes very uniformly at ground and sea levels.

If there are large-tonnage magnetic metals, magnetite or other objects that can affect the gradient of the Earth's magnetic field underground or underwater somewhere, gradient anomalies will occur in the Earth's magnetic field. High-precision measurement can detect abnormal points.

Moreover, this kind of measurement is a multi-dimensional measurement. The three-dimensional shape and precise position of the interference object can be mapped through a computer. Underground mineral deposits and underwater submarines can be located and identified due to differences in shape.

Magnetic anomaly detectors were actually first used to detect underground metal and mineral deposits, and they were only used to detect submarines in the late World War II.

Most modern submarines are made of high-strength alloy steel, and the steel itself easily induces magnetic fields. Although the submarine will undergo artificial demagnetization many times before or during service, the submarine will still induce a magnetic field as long as it moves in the ocean on the surface of the earth.

Even the submarines made of copper-containing low-magnetic alloy steel used by the Blue Navy, which has the most advanced underwater submarine technology, can only reduce the intensity of the submarine's magnetic field, but cannot completely eliminate the interference of the metal shell itself on the earth's magnetic field.

The reason why Boat No. 1 is sitting still is that it can deceive sonar and other anti-submarine means, but it can still be detected by magnetic anomaly detectors.

The biggest interference to the magnetic anomaly detectors on anti-submarine aircraft is the many metal sunken ships on the seabed. Because sunken ships are also made of metal, they are often difficult to distinguish from submarines that are sitting still on the bottom.

However, this area happens to be the D sea area of ​​​​the red side. The hydrological data and seabed sea conditions here have been clearly understood by the red side all year round. Wherever there are sunken ships, they have been calibrated.

There is a metal cat as big as Boat No. 1 on the bottom of the sea. Just compare the data and you can find this "Li Gui" immediately.

Of course, magnetic anomaly detectors are not without shortcomings.

Generally speaking, the accurate search distance for magnetic anomaly detection by red and blue parties cannot be too large within 400 meters.

The straight-line distance between the search aircraft itself and the target submarine is generally more effective within 800 meters, and more advanced improved models allow the distance to be enlarged to 1 kilometer.

After discovering the No. 1 boat, the navy could no longer hold back and wanted to immediately watch the two torpedoes from the yellow submarine under the sea. However, the seriousness in the red side's joint staff headquarters stood in front of the chart for a while, and turned back to wait for orders. The staff officer said: "Immediately send a report to the navy and tell them to surround three people. I will surround them with sonobuoys in the north, east and south directions. I will also surround them in the south direction of the strait, but leave a gap. Tell them As for the Navy, this does not mean that it will not be sunk. We are closely monitoring its movements. I want to see how many days it can survive underwater! If there is any specific news about Huang Fang’s No. 1 boat, please notify me as soon as possible!”

The staff officer was stunned for a moment, but still recorded the order, and then replied: "Yes!"

When he turned around and left to convey the order, he even muttered to himself: "Don't sink it? Keep it for the New Year?"

After the staff left, Li Zheng also asked seriously with some confusion: "Chief, if you don't sink it now, will you keep this submarine as a hostage?"

He said seriously: "No, no, no, I'm not interested in letting it be a hostage. I want it to be a catfish."

As he spoke, he touched the chart on the screen with his hand.

Four down, four positions.

Li Zheng saw it, that is, in the four directions of east, west, north and south with Boat No. 1 as the center.

Suddenly, Li Zheng's eyes stayed in the south.

That side is Lufang's control area, and Lufang Island is right there.

All places are fenced, except the passage to Lufang Island which is not fenced.

He seemed to see something.

But it seems incredible.

"Chief..."

He looked at Serious in confusion.

"Dare Boat No. 1 go there?"

Shaking his head solemnly: "I'm not 100% sure, but keep it and see how it runs. The decision is not in our hands. Do you think Wen Zhaohui will let it enter the Green Fang's control area?"

Li Zheng thought for a moment and said: "It is possible, but it is extremely small. If we go, it will be unless the No. 1 boat cannot catch him on the bottom of the sea."

Serenity held the tea cup and thought for a while, and thought it was true, so he said, "Then you go and notify the Navy people and tell them to throw some depth charges near the No. 1 boat. Remember, try not to sink it, just injure it."

Li Zheng said: "This is a bit difficult."

He said solemnly: "It takes a thousand days to raise an army, but it takes a short time to deploy it. Aren't the guys in the Navy usually very arrogant? Now it's time to test them."

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　　(End of this chapter)